diff --git a/requirements.txt b/requirements.txt
index 9c366ee..6b1dc89 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ Mako==1.0.7
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 multiprocess==0.70.9
 nbconvert==5.6.0
 nbformat==4.4.0